A New Jersey McDonald's manager suffered a broken wrist and another employee was slashed and needed stitches during an apparent dispute over a drive-thru order.

Authorities say the attack happened at a Berkeley McDonald's around 11:30 p.m. Sunday, after two men approached the 19-year-old manager at the drive-thru window and banged on the door after receiving their food.

The suspects apparently refused the manager's offer to give them a refund the following day, as the restaurant was closed, and instead assaulted him through the window. The victim told officers one suspect threw the bag of food in his face and grabbed him, and that he was then punched in the face and had his hand slammed in the window as he tried to close it.

A 21-year-old employee then ran outside and confronted the two men near their car, and authorities say he was slashed on his wrist. The suspects then fled the scene.

"Our biggest priority is always the safety and well-being of our employees and customers at our restaurants," owner/operator Lawrence Larsen said. "We are grateful for the law enforcement professionals who responded to this situation. We are cooperating fully with the Berkeley Township Police Department and defer all further questions to them."

An investigation is ongoing, and anyone with information is asked to contact the Berkeley Township Tip Line at 732-341-1132 x611. Tips can be anonymous.